If the job stops before the required directories here are created we
get a failure copying, which stops us collecting things that may be
useful to diagnosing the error. Put the copying in a block that
ignores errors.
Also just copy the /var/log/syslog -- I think this came in originally
from something running on CentOS which doesn't have this, but now we
run on Ubuntu hosts and syslog has interesting things for diagnosing
errors.
Change-Id: Iaca4801a652ef4a67772c804271ea5c1db377051
4689a7d938